Subtract 5/7 from 20/4
1st number: 5 0/4, 2nd number: 5/7
20/4 - 5/7 is 30/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 4 × 7 = 28,
20/4 = 20 × 7/4 × 7 = 140/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
5/7 = 5 × 4/7 × 4 = 20/28 - Subtract the two like fractions:
140/28 - 20/28 = 140 - 20/28 = 120/28 - After reducing the fraction, the answer is 30/7
- In mixed form: 42/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/4-5/7 20/4-10/7 20/8-5/7 20/4-5/14 60/4-5/7 20/4-15/7 20/12-5/7 20/4-5/21 20/4-25/7 20/4-5/35 20/4-35/7 20/28-5/7 20/4-5/49